1650917157121 has 2 divisors, whose sum is σ = 1650917157122. Its totient is φ = 1650917157120.

The previous prime is 1650917157103. The next prime is 1650917157187. The reversal of 1650917157121 is 1217517190561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1180458347121 + 470458810000 = 1086489^2 + 685900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650917157121 - 2²⁹ = 1650380286209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1650917157101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825458578560 + 825458578561.

It is an arithmetic number, because the mean of its divisors is an integer number (825458578561).

Almost surely, 2^{1650917157121} is an apocalyptic number.

It is an amenable number.

1650917157121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650917157121 is an equidigital number, since it uses as much as digits as its factorization.

1650917157121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 46.

The spelling of 1650917157121 in words is "one trillion, six hundred fifty billion, nine hundred seventeen million, one hundred fifty-seven thousand, one hundred twenty-one".